What options are there to make this work?

It included items such as fund raising and various options and associated limitations of the options.  

(option to go to 24, but I want the initial project to begin locally.)Location- OhioMarket type- Local, within 8 miles to meBuilds- Identical 2700sf, 4 bed, 3 bath , placing the same structure that meets the tenants criteria in 9 locations.Debt: Seeking a refinancing option  based on a 9% cap rateThe difference ( 450,000 x 9= 4,050,000    vs    NOI of $384,261 / 9% = 4,269,576 or $474k/property + tenant)with our continued rates of appreciation and a standardized tenant/lease structure in place, this should be a win for everyone.Who has a solution?

Katie had several different options in her response that was quoted in your reply.

I haven't found an answer to this specific question on BP or elsewhere online: if I die, and my SDIRA that holds investment property goes to my adult child, what are his/her options? 

Also are there any other options I can consider? 

You will then have a few options with that rent money....you can put it into principal or you can start saving it to purchase yet another property.

There doesn't seem to be another option. 3) Do my spouse and I have to file two separate NPT returns for the rental income as we are joint federal filers?

Overall, there are a ton of really helpful suggestions in the replies here so I think you should definetley weigh some options in terms of if your goal is to keep the tenants or have the units be up to market rent. 

I would love advice on which platform I can use to collect rent from my tenant.