Finally, obtain a professional appraisal post-renovation to accurately determine the new value of your home.

I found a MHP that I am interested in possibly buying and came here to see what information I could find to help me determine if their asking price is reasonable and how to determine its value myself. 

To determine the best pricing for farm rentals, consider factors such as location, proximity to schools, highways, and amenities.

I think many people have sufficiently answered your question, but here's an article that you may find helpful regarding STRs to determine if this is a strategy you are interested in.

I've been considering trying to build one on a plot lans but I'm having a tough time determining construction costs, and financing options.

The home buying process typically follows these key steps:Assess Your Finances: Review your credit score, savings, and determine how much you can afford for a down payment and monthly mortgage payments.Get Pre-Approved for a Loan: Work with a lender to get pre-approved, which gives you a clear budget and shows sellers you’re a serious buyer.Find a Real Estate Agent: Partner with an experienced agent who knows the local market and can guide you through the process.Search for Homes: Browse listings and visit properties that fit your criteria (location, size, price, etc.).Make an Offer: When you find a home you like, submit an offer through your agent, including contingencies (financing, inspections, etc.).Home Inspection & Appraisal: Once the offer is accepted, hire an inspector to ensure the home’s condition and the lender will order an appraisal to verify the property’s value.Secure Financing: Finalize your mortgage by submitting required documents and ensuring the lender clears you for closing.Closing: Sign the final paperwork, pay closing costs, and receive the keys to your new home!

Thankfully I had negotiated a pre-determined buy-out right where I could buy them out at a fixed IRR at any time. 

Talk with an investor friendly mortgage broker to determine your budget for a single-family and a small multifamily property. 

I'm a 24-year-old man that's determined and ambitious and that wants to be extremely successful in all endeavors of life.

Sounds like you're in a great industry with flexibility and the determination to hit your goals!!