Bernie Sanders wants a 25% “house flipping” tax levied against investors who sell a property at a profit within five years of purchase.He also wants a 2 percent “empty homes tax” on the property value of vacant homes in order to discourage real estate investment.From Bernie's Website"When Bernie is president, he will:Create an office within the Department of Housing and Urban Development to coordinate and work with states and municipalities to strengthen rent control and tenant protections, implement fair and inclusive zoning ordinances, streamline review processes and direct funding where these changes are made.This office will convene key leaders, academics, experts, local officials, renters, tenants, and homeowners to create and implement these necessary solutions.Preempt laws that prevent inclusionary zoning for luxury developments.End exclusionary and restrictive zoning ordinances and replace them with zoning that encourages racial, economic, and disability integration that makes housing more affordable.Require that recipients of federal funding from the Department of Transportation and the Department of Housing and Urban Development make these important zoning reforms.Provide funding to states that preempt local exclusionary zoning ordinances to make housing more equitable, accessible and affordable for all.Make federal funding contingent on creating livable communities.Encourage zoning and development that promotes integration and access to public transportation to reduce commuting time, congestion and long car commutes.Prioritize projects that reduce greenhouse gas emissions, create walkable and livable communities, and reduce urban sprawl.Encourage zoning and development designed to expand and maximize the number of units fully accessible to people with disabilities.Place a 25 percent House Flipping tax on speculators who sell a non-owner-occupied property, if sold for more than it was purchased within 5 years of purchase.Impose a 2 percent Empty Homes tax on the property value of vacant, owned homes to bring more units into the market and curb the use of housing as speculative investment.Encourage “circuit breakers” on property taxes to protect homeowners in gentrifying neighborhoods from being priced out of their own homes as their property values rise.READ MORE: https://berniesanders.com/issues/housing-all/From my point of view, anything that impedes or obstructs REI's cash flow is a bad thing.

The units are large (2,200 sft) and feature custom kitchens and baths, granite tops, wet bars, fire places, and cathedral ceilings.

Look at comparable sales to see what kinds of features and finishes are common for properties in that price range. 

I like the search features: https://www.biggerpockets.com/searchUse the Bigger Pockets glossary to learn more about real estate terms that may be new to you: https://www.biggerpockets.com/rei/glossary

If there are design or structural issues or consolidations you will want to talk to some architects and or engineers for proposals prior to meeting with the GCs 

I like the search features: https://www.biggerpockets.com/search

These ADU initiatives were designed by politicians not developers so don't expect their plans to always make the most sense in terms of holding the carrot in front of the real estate investor. 

Theres a huge tech community emerging in the Dulles area. https://www.washingtonpost.com/news/business/wp/2018/06/22/feature/forget-silicon-valley-the-dulles-tech-corridor-is-cultivating-companies-that-break-the-mold/With DC and Northern Virginia booming I see some serious upside in towns in Fairfax county(VA), Prince Williams County(VA) and like what Russel said western towns in Prince Georges county Maryland.

Good afternoon Yall,I am a soon to be licensed architect preparing to purchase a lot a half hour drive from Breckenridge, Colorado in a thickly wooded, slightly sloping subdivision that sprawls up the mountainside with plans to build a small, modern and well designed SFR. 

These get snapped up pretty quickly so I'd take a look at recently sold properties up $100k, compare against rentometer.com to get an idea of where you get close or hit the 1% rule, and check for new listings regularly in those areas that you've designated.