So I wonder if I can sell my home in Idaho, purchase the new one under my personal name, then how many months or years must pass before I can setup an LLC as the owner of my primary residence, or if you think that will be a good idea? 

So, you can do a land contract for 12 months, which should allow lender to credit you full value of the land vs the purchase price, but the loan will pay off the land contract, so the lender maintains first lien position.Can't help you with the rest of your question, but you should be able to search for "CPA" here on BP to find experts to reach out to.

Make sure it explicitly explains the process for termination if you are unhappy with their services, especially if they violate the terms of your agreement.3.

After several months of hard work, I was able to raise the value of the home.

So your debt is currently $3000 per month and your property earns you $1000 per month? 

Utilities are OFTEN overlooked so reach out to power, telecom, gas (or go all electric), water, and sewer to make sure you understand what it would take to get separately metered services from the primary house.

PM is a service business and time is very valuable.

We are starting to get $1,200/month there.

There is so much free content out there that can teach you about guest services, software, vendor management, and so on. 

We host a free real estate meetup the first saturday of every month if you are interested in coming and meet some awesome real estate investors who are looking to do their first deal to savy seasoned investors.