Many of these properties/portfolios are "syndicated" so that the sponsor of the offering holds onto it and sells each piece off to an investor, one at a time, to accommodate their unique 45/180 day deadlines.

I want to automate the showing process, by having prospects registering (sending maybe a copy of the DL) and providing them a unique code within a specific time window to go and see the property. 

To the extent that you wish to trust the demographic data entered by the loan originator, Home Mortgage Disclosure Act data is publicly available so social justice groups can sue lenders for unlawful discrimination if the data indicates that is warranted (Wells Fargo etc).CFPB has an interactive website that lets you play with the data.If there is something unique about properties in the area you want to buy in that you want to get in front of, nothing will beat picking up the phone and calling agents in the area.

Could be a combination of more than one of those.The numbers look good but definitely get a home inspection so you know what you're dealing with.

I'm trying to find the best combination of profit margin, landlord friendliest states/cities and areas with best chances of property appreciations.

I'm trying to find the best combination of profit margin, landlord friendliest states/cities and areas with best chances of property appreciations.

Each deal is unique and you need to figure out what will work for your business. 

See Deduction over $500 for certain clothing or household items, later.If the property is valuable because it is old or unique, see the discussion under Paintings, Antiques, and Other Objects of Art.Used Clothing Used clothing and other personal items are usually worth far less than the price you paid for them.

In that case you may want to look at combining a 1031 and 121.  

On page optimization (essentially rewriting all your content so it’s unique and will help rankings), off-page (all your local listings, directories, etc), back-link building, consistent content creation, getting that content on high authority pages as a third party contributor, ideally linking back to your site, etc.