You can put a mortgage into a "trust: without triggering a due on sale but again contacting your bank/lender is the best route to avoid any issues.Some banks/lenders or servicing companies change guidelines and even a trust may require other paperwork but the attorney usually facilitates that to be safe.  

You aren't required to offer a loan mod prior to foreclosure.

I know they are compensated per unit for the inspection, do you think it would be an issue if I just registered a fifth unit and made sure it met all the requirements?

Assuming you don't have a mortgage that requires a certain level of insurance, you can get a stop-loss policy covering all the properties. 

Acid washing when required is $500.

If you are not already working with a realtor that is well versed in STR and knows ALL of the requirements for STR, do yourself a favor and reach out to @Josh Green.

As for income verification, I require the applicants two most recent paystubs and if self employed I need their most recent tax return.

Quote from @Adam Macias: Wholesaling as it is today will be a thing of the past.It’ll truly be strange to even hear people and gurus trying to make big money off it.The more people try wholesaling but then end up not having an end buyer or cancelling contracts or trying weird things like novations, the more all of real estate will be regulated and cause requirements like licensing to be able to transact more than just your personal resident purchase.Which I don't know why hasn't happened sooner.Here's all the states (in red or yellow) requiring a license to wholesale or at least have started the process:Credit: REITipsterI think licensing and regulation is a beautiful thing that should happen if you plan to be an wholesaler and do more than one deal... which is going to be the case for anyone taking this business seriously.Or even it being regulated to need a real estate agent to do more than one deal outside of buying a personal residence.I've had plenty of failed attempts with agents in pursuit of wholesale deals and I know exactly why, it's not because the agent couldn't find me deals, it's just not practical to think there's opportunity for the numbers a wholesaler needs to make a profit on top of everyone else needing to these days.Because the only sellers who truly can sell at a deep enough discount are usually those who ran out of time and just didn't do something sooner with their situation.I know many coaches and gurus will disagree with me but there’s no regulations on youtube gurus and what they teach either.If we look at the current state of the market in hot cities, the availability of online resources to the average homeowner, how many deals can you possibly believe are available at 70% of ARV?

Not many people dig too deep on the actual requirements so kudos to you.

You could also use a Fannie May Home style renovation loan which a conventional loan and require 5% down vs.