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.

To thrive in real estate investing, you must maintain a firm grip on your finances.

While I do maintain a relatively modest percentage of my assets in money market instruments, corporate debt funds, and high dividend stocks, I remain most comfortable with the investments I specialize in and know best.  

Small is easy to maintain as long as renovations were done correctly.

If an LLC is the best way to go, should I create the LLC in Idaho using an address I plan to maintain in Idaho?

Then rent the bigger home out using a property manager, allowing her to possibly cash flow and maintain that asset and let it continue to grow in value.Encourage her to consult with a CPA or tax attorney to explore the best strategy tailored to her situation.

If maintaining cash flow is your primary objective, you might want to explore other options.

Lots of people who have trailers don't own the property they are on and sell them.As for the owner of the land expecting tenants to do repairs-there shouldn't be many repairs required to the land, just the trailer that is on it (which your grandmother owns and should be responsible for maintaining). 

It would for sure have to be a higher hourly rate than a typical W2 job however as agents are 1099 contractors and there are expenses associated with maintaining our licenses and operating our businesses that usually come out of our commissions.

You can purchase them yourself and just hire an HVAC tech to install to save money, but it's going to cost more plus you'll have to maintain them.