This will allow us to travel more and spend the rest of our lives as we please.

I would spend the time to gather rehab costs, and simply go back and make your offer.

dont be afraid of spending a little money for legal council to draft your agreement

However....the upside of renting is that you wouldn't be doing what we do.... spending much of our time pruning, planting, staining, painting, fixing, remodeling something, thinking about adding something (like..."

One thing is to see it in charts another is in person.On my first trip I spend hours driving around and zoned in a neighborhood University area at the time I saw monorail to downtown was being build in that area and knew it would only increase the value of properties.I like being close to major Hospitals/ Universities feel there will always be a demand even during a recession

First, if you're not using a service, how much time do you spend with each lead?

I spend in marketing and acquiring motivated sellers. 

To get there, at a minimum you will have to:Repair the 11existing homes x $15k per home = $165kHunt down 7 used homes, transport, set up, make repairs x $25k per home = $175kSell all 18 homes to qualified tenants (you will likely have to carry paper on the homes, which will eventually return the capitalization above, but assume it will take 5 years or more)Repair the park infrastructure, roads, signage, the residence, landscaping, etc (let's assume you will spend at least $50k on this if you are lucky, though it could easily turn into a lot more) The bullet points above will likely take a couple years and it could take double that, depending on how aggressive you are, what the availability of good labor/contractors in Indy, and what kind of demand exists for that location.  

I don't know if there is a defined number of hours you have to work each day but let's just assume you should probably spend at least 4-6 hours per day on "business" items.

Second, typically even if properties are in great shape you still will want to spend some money on repairs, typically one of the better ways to make money in real estate is to find properties that can have value added to them, via hiring contractors to do repairs and improve the property.