Hire a professional to do the job. Everyone that I work for tells me how easy I make it look. With 30 years experience under my belt I can get in there get it done and move on. If you rent, and have no experience running heavy equipment, my guess is that you will still hire someone to come in and fix your mess. Been there done that. I've seen guys buy an old HD 6 Allis, go to work, final drive goes out. It usually cost more to repair those old machines than what they are worth. It will be cheaper to hire someone who has experience.
Just my two cents worth.
Kerry in Mid-MO