I understand that that a home in Jerome Village would already have property tax, that would include additional fees for the roads, infrastructure, etc. and that it's based upon "millage" and the home's assessed value. 

Underwriting will assess the performance and appraisal of the property based on traditional long-term rental comps.

Once you've pinpointed your objectives, it's important to assess your financial situation.

This could mean investing in property flips or purchasing out-of-state rentals for more stable income, but it would require letting go of the $1,350 rental income from the manufactured home.What factors should I consider for each option, and how would an experienced investor assess this situation mathematically?

For example, you buy a house for $1,000,000 but you say you bought it for $100,000How do they find out how much you paid for a house to assess their tax?

Qualifying as a Real Estate Professional (REPS) is assessed annually.

If you look at the tax assessment, there will be an assessed value and the taxable value. 

Get detailed quotes on these to ensure it’s cost-effective.Zoning & Permits: Verify that your current property allows additional homes and meets zoning requirements for multiple units.Rental Demand & ROI: Assess demand for singlewide rentals in your area to confirm it’ll be profitable after all expenses.If everything checks out, these could be solid additions to your portfolio.

I am a big advocate of home ownership, but in the situation you are describing (not knowing how soon you would leave), it might not make the most sense to buy a condo with restrictions or potential assessments in the future.

While my insurance charges are relatively low each year given this is a condo, I learned to better assess who is behind budget planning at the HOA level for all of the units for roof, cleaning costs, basement improvements (shared by all units), given this was run well by one individual.