I am also aware of using business credit cards and liquidating them, however is that a good route?

The mentors are all very nice and try to be helpful, but if you have to put the course on a credit card then save the money and invest it

You do this by becoming an authorized user on your parents credit card.

The mailer I am sending is going to be simple - 5x7 cards and in 2 languages based on demographic data (I speak both those languages fluently) ...

Or if you can get a 0% interest credit card to purchase materials - I've had to do that in the past and put 70k on two credit cards :-/ Then when the bank finally came through I paid off the CCs. 

Here are the best reasons I've heard from tenants who were late on rent:-'My son used my debit card on some Christmas presents for himself and I just found out and am canceling the orders.

Business credit cards?

A direct booking site still has to process a credit card payment.

I'd like to explore card operated laundry to provide that as an option for tenants, to offset the cost of running the washer and dryer while I pay for utilities. 

You are spot-on about Las Vegas multi-family properties having lower CAP rates and higher vacancy rates, but there are still opportunities if you play your cards right.