With retail you have mom and pop, regional, and national tenants.Often mom and pop tenants can't afford attorney representation so try to do things on their own to negotiate a lease.Owners could try to write anything into a lease but doesn't not mean it is legal or enforceable.

A lot of forum members are very knowledgeable in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, rentals, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.If you haven’t been to it already, you might want to check out the BP blog: https://www.biggerpockets.com/renewsblog/Alerts can be really helpful too: http://www.biggerpockets.com/alertsThere are a few self-contained guides that you can access here: https://www.biggerpockets.com/guides

With regard to STRs, when using cash basis, you don't really get a good picture of how your business is doing and prepaid expenses can make your financial reports look really inconsistent; large income/expenses one month, then very little income/expenses in another. 

An LLC is a legal entity that has nothing to do with taxes.Your LLC per se is non existent for the IRS.

A lot of forum members are very knowledgeable in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, rentals, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.If you haven’t been to it already, you might want to check out the BP blog: https://www.biggerpockets.com/renewsblog/The site has quite a few tools that can be helpful for new members.

I could do this with a SFR or a multi family unit up to 4 units, and rent out the other 3.It seems very difficult to find a good multi home, as they are all snatched up quickly...So I guess my question is:Are their any legalities associated with this?

A lot of forum members are very knowledgeable in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, rentals, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.Discounts on some products and services are offered to BP members: https://www.biggerpockets.com/perks/proIf you haven’t been to it already, you might want to check out the BP blog: https://www.biggerpockets.com/renewsblog/The site has quite a few tools that can be helpful for new members.

The legal costs of starting information services aren't trivial, and being an advisor is far thornier, and may even require licensing.As for machine learning, artificial intelligence and APIs, note that they do not fix GIGO (garbage in, garbage out).

The alternative is a nice big rent hike at the limit of legal acceptability, like 10%, and the explicit threat of keeping them coming.

@Dhruv Anand you would need to form your own fund or “sub-syndication”, which does require going through the usual legal process.