Also, be sure to read up on the new laws hitting Colorado Specifically.

As far as the lender goes, if I'm buying properties that qualify for conventional loans does it really make a difference if I build up a relationship with a specific bank vs just shopping around each time I buy a new property?

This is a very common issue in commercial/private money space.

Since the start of the year, I've read a handful of BP books:- Rental Property Investing (Brandon Turner)- How to Invest in Real Estate (Brandon Turner/Josh Dorkin)- Investing in Real Estate with No (and Low) Money Down (Brandon Turner)- BRRRR (David Greene)- Multifamily Millionaire Volume 1 (Brandon Turner/Brian Murray)- Start with Strategy (Dave Meyer), currently readingI was thinking of using the equity to BRRRR small multifamily properties and combine some concepts from both the BRRRR and Multifamily Millionaire books (specifically making cash offers via HELOC to secure distressed properties, ideally vacant to set market rents).

We're doing no development, but I've heard many stories about a Phase 1 turning up nothing and big issues (ususally underground tanks) being found once the dirt starts being moved. 

Sprinkle these into the portfolio and it will get you to 10k faster.Here's the issue, I'd say in more than 75% of the markets in the US (broad guess), the 1% rule is a thing of the past. 

get more micro. we define a zip code as a market. there are about 7 zip codes in the city of columbus that we work in as well as about 15 in Miami. we look at the average housing unit delivered and try to develop under the median and average home or condo where there is a lot of absorption. that is mostly through smaller Floorplan design, smart floorplan design, etc. new construction and development you also have much more control over the overall development just my 2 cents. if you are just buying existing it's going to have some issues 

So I am seeking advise on platforms to advertise the units, how to vet potiential tenents, how to create a lease agreement, how to collect rent, and any other helpful tips/advise that anyone would have. 

If you’re honest from the start, the seller knows what to expect and you avoid any potential legal issues.

That should fix your cash flow issue while also giving you a bit more security, since you're not counting on a single lease anymore.