After considerable research I'm kicking off a program to do home hydrogen conversions.

I'm gunna assume that wont be a problem either.Your final consideration would be damage to property.

The draw back to these loans is that they are more paperwork heavy than the other "portfolio" types of loans...tax returns, etc....but if you have ever received a loan on your primary home, it's likely that you will go through the same type of paperwork here with conventional lending.

Take that into consideration.Now, also take into consideration that finding buyers is easy. 

Here is a good outline of important considerations in choosing a ROBS provider: https://www.nerdwallet.com/blog/finance/how-to-choose-the-right-robs-provider-when-financing-a-business/ 

So after a lot of consideration I have set my goal in 5 years I want to be making 10k a month in passive income so I can eventually leave my current employment and focus solely on investing.

I was almost completed the underwriting for a "operation welcome home" loan which previous allowed in its guidelines that would take income from a rental unit into consideration for the approval of the loan.

As far as future, no one knows but Portland likely will continue to draw tourists and Boston people resulting in a solid rental market.

This means that you will need to pay registration and filing fees in at least 2 states if you don’t buy CA property.This article goes into a lot of the considerations about whether to form an LLC or not: https://www.mmpph.com/wp-content/uploads/2019/04/May-2019-newsletter.pdfBe sure to tell your accountant that you now need to file non-resident income tax returns in each state where you own property as well.

The draw back to these loans is that they are more paperwork heavy than the other "portfolio" types of loans....but if you have ever received a loan on your primary home, it's likely that you will go through the same type of paperwork here with conventional lending.