Same issue on 2 both the Costco and Lifeproof products.

What are the best methods and products to tackle these tough cleaning tasks?

There is no such thing as a "guarantee" only the perception of.if it's a concern in your offer, find out what it would cost to carry a bond or insurance product for the seller. 

My favorite link for the proper order of investments is https://mymoneywizard.com/correct-order-investments/.Jump in.

You could then get a HELOC/LOC on that paid of property (a product that doesn't require you to use it) and then if you did have a big emergency you had a line to use on it.Now, ALL of this is dependent on how much money you have in the bank, how many properties you have, what your income will be like in retirement, what the standard age would be for your end of life (that's a scary one to think about), and while yes, you can certainly take equity out I just think it would be good to sit down with a financial planner...or even some other investors that are local to you that are around your age demographic and see what they are doing.I'm glad you are thinking about this for sure.  

Stay out of Endsley that's the worse area.Watch out for those turnkey products.

If you screen your tenants properly, buy the right property and have the right team in place you can be successful.

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

Sold products for my day job in South America. 

Or, at least the company's offering them in other states think Texas law would not look kindly on the product so as you point out they do not offer in Texas.