Bert Jabin's on Back Creek would have the room. However, you'll pay for a haul-out, for the time spent on the hard "in storage," and for launching the boat. I have a slip there, so my winter storage when I am on the hard is slightly discounted. I am paying just a bit under $5 a foot per month this winter. Haul-out and launch in the neighborhood of $80 for each (just a guess based on last year; I am not at home, so I don't have access to my files). Summer rates (which start on April 1) for storage are higher than winter rates. Local phone number is 410-268-9667; DC phone number is 301-261-1788.
I suppose it is possible that for a haul-out just to paint the bottom, they might have some type of package "deal."