I'm not trying to scale or acquire "more doors".  

You can always start off in real estate by acquiring a property as a primary residence.

auctions will be a difficult way to acquire properties as a brand new investor.

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. 

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

Sold products for my day job in South America. 

Reviewing their product page it does appear the $25/month is base with the marginal $1/unit pricing after that. https://latchel.com/emergency/So more economical as the portfolio grows, though very curious Your XP once repairs are triggered since most after hours calls would be “surge pricing” for any contractor they bring in. in 15 years I’ve only had a few of the stereotypical “after hours broken toilet” calls, but I know that’s highly variable by location and property class.

Also, would you be opposed to a bridge product until it's stabilized?

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

I will then keep up the process to pay off a recently acquired duplex with about $72,000 in debt.