You will gain a lot more, doing one cycle a year, than you would training natural for the same amount of time. I'm sure you can see, that as you've progressed, the gains come on slower and slower. For a well developed guy who is training naturally, gaining 1-3 lbs a year is decent progress. If you run a small test cycle and gain 25 lbs, you may be able to keep 10 or more lbs, by the time you have recovered. The key will be recovering your natural test levels and eating enough to maintain your gains. Once you are off and recovered, you naturally aren't going to be able to look quite as hard as when you were on, but you can gain and hold some good muscle. 

I would suggest this cycle. Cost won't be too high. Gear is much cheaper than the food it takes to grow and hold lean muscle. 

1-10

Test E 500mg EW

Adex .5mg 2 to 3x wk

1-6

Dbol 30mg ED

1-11

HCG 250IU 2x wk

PCT beings wk 13 with Nolvadex 40mg ED, then 20mg ED in wk 14 and 15