If I do this, will IRS (or any other government entity) start looking at me and wondering what's going on?

Entities are primarily used for protection from liability.  

An attorney would be able to advise on risk mitigation via insurance vs an entity + commercial loan.

Keep in mind that you'll need to qualify full doc (DTI, employment history and income will all come into play) and the property typically needs to be titled to yur personal name, not an entity. 

You can buy part of a note or perhaps a small note through corporate entities, crowd funding, 506 entities under SEC, but guess what, the SEC only authorizes the formation and operation of pooling investors, these set ups absolutely do not give license to sell or trade stocks, bonds, mutual funds or mortgages as a broker dealer, those requirements are in addition to the pooling of funds authorizations.

Within those detailed reviews, we have accumulated a long list of legal entities and people who have received funds that don't seem to align with the business of Mobile Homes.

Whatever cash is going to be used for the entity should ideally be in the company accounts for 60 days.

You get a proof of funds letter, but most entities won't accept it because it doesn't show bank statements.

That's the key component that is usually missing when I hear other entrepreneurs/investors say they don't like QBO.Something else to keep in mind is your entity structure and how your entities file tax returns.

The entity formation rules will definetaly be different for each state.