If you feel bad and want to save people money, start with a free pre-screening.

I figured why not just use a banks money instead of using a customers money and not have to deal with picky customers.

I was with them for 3 years, and during that time got 0 money on my investment, and the communication was not great. 

Or just sell it at a loss… I need some guidance here, I know very little about real estate investing other than I know I’ll be losing money after maintenance and paying a property manager.

Do not spend any more money on wholesale courses.

I have the private money lined up for the 25% down payment.

This is advantageous bc later you have a third party loan (not your personal money) so seasoning period is 90 days to DSCR out. 

I don't know anything much about real estate, nor have the money at the moment.

Keep in mind, you should have already had a conversation with the hard money Lender to know their terms and process, and be ready to perform. 

Move the money in and out as tenants move in and out.You need two accounts: checking and savings.