I had a company come out for $100 and it caused more bugs, which is normal.

Does a clog like this develop slowly over time (normal wear and tear) or is it a direct result of something specific that was washed down?

2 of the tenants in a 4plex I manage have been complaining that their electricity bills are almost double their normal amount.

Regardless of your choice, just remember that fear is part of the game and it's normal to have it but never let it consume you when the I's are dotted and T's are crossed, sometimes the only way is through so take courage and go on your way!

They could be owned by people renting a cabin and are not normally there.

Now I know it's competitive, but I'm curious from someone that has experience in the area if this is normal and actually what it takes to win a property there or if it's just insane to put 10% as due diligence payment?

The time and energy and money and resources you use to buy a BRRRR primary home you can find 2 properties to buy.I would suggest exploring...at least EXPLORE it first...buying a primary home with a normal loan, ask about "first time home buyer" programs, and if you do find a good property then BRRRR that one separately.  

You will get some sort of "normal" loan, for the sake of argument 20% down.

They have more skin in the game then you do.Make sure you get clear title.

Your policy normally will only cover property you own. not property that belongs to someone else.