Location, condition, parking, loading access, vehicle per day count in front of the building, Lease type (gross, NNN, Modified...), length of the desired lease, zoning, all of these can influence price. 

If you sell in a "regular" park then you also need permission from the park owner, and they must approve the new buyer. 

The off street parking/small garage really only accommodates one unit, I had the idea of charging for off street “priority” parking and if she doesn’t want to include this, my SO and I will use the driveway.

If you own it free and clear it would give a better return than parking the money in a CD at today's abysmal rates, but that doesn't mean it's the best use of your money.

One of their main sports fields is sort of across from our parking garages but the pedestrian access to our building is on a different street.

Quite often the operators in this space will paint the exteriors, add a new sign, improve the leasing space, add dog parks or playgrounds, and then finish with some level of improvement in the interiors of each of the units.

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

Brag about the parking spot.

I always recomend doing a cosmetic rehab (white quartz, white cabinets, bathroom vanity, add in unit laundry, paint) these can be done very affordably and often see a 50%+ increase in rents in the trendier house hack areas like avondale, logan square, albany park, etc.

I am developing a 40 Site RV Park and currently seeking capital for the build out.