Honestly looking at your situation I'm not sure I would recommend you do the taxes yourself,  change of accounting method (F 3115) isn't easy for someone that hadn't done them before these online software companies make things seem easier than what they are, they are good for less complex situations. 

You will get killed on the C and D properties which are usually the majority of most properties handled by a metro PM company. 

You could also use "Doug's LLC and/or assigns" where Doug's LLC is your hypothetical company.As for the assignment contract, you can get one from an attorney for probably less than $1,000, you can also make a friend at a title company, they probably have a template they could give you.  

Similarly, quality dividend-paying companies often retain some earnings to reinvest in their business, increasing the company's (and your) value over time.

Personally, I advocate for a long-term investment strategy and would recommend investing the funds, provided you are comfortable with the expected return on investment over time.

Is the house Cashin platform a good place to find closing companies.

I would be cautious with MLD residential lending company.

Along with not having sufficient funds to operate their real estate they fail to consider what happens when the property must be refinanced.

You'll need to hire a title company to find out. 

After 45 + years as a real estate investor, broker, lender, fund manager and syndicator, I’ve become aware that the “dream” of many investors and investor “hopefuls” is to be able to generate enough cash flow to live off their real estate holdings and accumulate enough wealth to make “work” optional.