As far as mixing funds, the best way to prevent this is to have a separate bank account and a separate credit/debit card for your LLC.

In general, you can't "cash out" and purchase a piece of real estate at the same time  --- this isn't like using a debit card at the supermarket and getting cash back.   

And a debit card with one month's rent.No paper trail, and this is not advertised.If you are going to give, give!

Cash to close is usually the down payment, points, any other lender fees, prepaid interest and insurance, and your standard closing costs. 

Regardless of whether you pay it off and finance later, or hold onto that money, it sounds like you are going to be using debit for your next properties either way.

you also need reserves when you buy a home. usually 3 months. in addition to down payment you will/may have closing costs (some programs allow you to roll those into the loan) and you will have "prepaids" such as taxes, insurance, HOA fees, etc.Sounds to me that you should opt for a little longer hold period.

It’s very easy to do an electronic debit to someone’s account with the numbers. 

Don’t forget that interest paid as part of payment is deductible in the year paid, whereas prepaid interest (the $3800) option must be amortized over the life of the loan.

Prepaid deposits retained along with prepaid taxes or insurance premiums should be adjusted.

The extra $5000 is used to pay closing costs and pre-paid items like insurance and taxes.*** There is no money needed in the transaction except a $500 application fee.