Most residential mortgage lenders that I work with max out their LTVs on primary residences at 70%, which would mean a loan of $336k.

I'm coming from having some success with residential real estate.

Random things like this.I can only imagine if they did allow you to add all the bedrooms, they would make you also add fire sprinkler system and a commercial fire alarm system like residential assisted living. 

In Residential, just picture that in general most everyone is a vulnerable person, in eyes of law.

For the last 22 years I've been involved in real estate as a house flipper, with extensive experience in building and renovation contracting, owned a residential property management company, and now have a private money lending business (licensed NC re broker).

When you own leveraged real estate you're getting at least a 4.5% return just on the debt the resident is servicing.

If the residence is inside a gated subdivision or a controlled-access buildingthat is governed by an owner’s association, a letter from the association acknowledging the use and grantingaccess to occupants of the rental unit will be required as part of the application.A short-term residential rental requires a Conditional Use Verification (CUV).A short-term rental use is unavailable and prohibited within a residential unit or a room within a residentialunit that is located in an apartment building.

What people find appealing about Bitcoin, is what made it run afoul of the post-recession and post-9/11 PATRIOT Act anti money laundering stuff.This is a direct quote from the FHA Customer Service team at the Department of Housing and Urban Development, again for an FHA loan.I am sorry, without a traditional bank statement, we could not verify the Bitcoin funds came from an acceptable source and was not provided as a loan by an unauthorized party to the transaction.

One major lesson learned is that commercial financing is no where close to residential financing and that you need to give yourself a decent amount of time to line things up.

Promissory notes in general, as they have no collateral, seem a bit higher risk, perhaps mortgage note investing which are backed by residential and sometimes even commercial real estate would be a safer alternative, and yet very lucrative, too,  8-12% yieldsFor extra returns, I put a small portion of my portfolio into BDCs, Business development companies, that specialize in loaning money to growing businesses which are too high risk to get loans from proper banks.