In other parts of the country, lot rent might be $200-$300.
What you really have to look at is your total cost of occupancy. Example: Even with that $842 lot rent I mentioned above, someone in Northern Virginia could rent (or buy) a 2 bedroom 1 bath manufactured home in great condition for about $1,100 a month. That'd compare to rents in condos of about $1,300, and a monthly cost to purchase a condo of about $1,800-$2,200.
So, look at total cost of ownership. Oh, and while I'm not an accountant, if you qualify as a "first time homebuyer" under IRS guidelines, you can take the first time homebuyer's tax credit for a mobile or manufactured home purchase.
Hope that helps.