I'm more interested in purchasing 10 homes to have fully paid off by the time I retire, as I'm not living on the cash flow w/ current job. 

They will have some questions and ultimately you can get pre qualified. 

As a few mentioned, depending on your situation you might have to do a DSCR Cashout (vice conventional investment), and with hard money loans often there is a pre-payment penalty.

I renovated the home while 3 of my friends lived with me and paid my mortgage.

Mostly MF and self storage.I bought an industrial property from a wholesaler, paid him a $600,000 fee. 

I paid about $1,500 for the installation of a high-quality 4-security-camera system, which can be monitored by both the tenants (and you!)

Will that be paid up by then as well?

It turns out that we were never going to get paid out in the first place, and eventually found out some of my properties closed, but was still never paid out for them, but most of my properties simply just ended up dropping and i was never informed of it.

I have had my property manager paid to oversee the renovations. 

They have a podcast, a mentorship program , and a website with (paid) investor reviews in less than a month.