To prevent those items I suggest lots of tenant screening questions (back-round check, credit check, eviction search and income verification) and an annual maintenance plan on your properties. 

I have multiple mortgages, banking accounts, credit cards, brokerage accounts, crypto currency accounts, crowd funding accounts, employee 401k, self directed ira, employee stock plan administrator, shares in a small-town bank, I feel like I could go forever.

I did experience turnover as some took advantage of the $8k 1st time homebuyer credit and young people consolidated- moved somewhere with a roommate or back home, but they filled quickly for more $. 

About me: 27/M, DFW area TX,Salary ~ 50k gross Rent + Utilities ~ 25% of salary (shared house).Car ~ 10% of salary (9k owed and 3 years left).Credit cards are usually paid off or Utilized below 6%Credit score above 750.6 month emergency fund.

.), I am considering using my equity instead via a Home Equity Line of Credit (HELOC) to fund the next deal.  

It can't hurt to ask for some credits.

I’m an investor with an >800 credit score.

What is the standard percentage down hard money lenders require & are they going to run a credit check? 

Obviously, high percentage credit cards are good to get rid of, but these other areas are up to individual desires and timelines. 

What has been your personal experience with Lines of Credit being frozen?