Well I suppose that is kind of technically what I do after each flare, I get infliximab/remicade episodically in my case its used as emergency treatment - if I flare I get a dose and then go on my way until symptoms return which for me so far has been anything from 6 months to 3 years.
My GI did try for a while to get me to have it regularly, he said that I could just go on it for a while and then come off it and he has a few patients who have done that but like I said to him I didn't see the point as one dose gets me to where I need to be, having it however many times for the sake of it and to then stop it anyway just seemed pointless to me.
Oh and I'm maintained on methotrexate too, I'd never chance going totally maintenance free and if you were to step down from the big guns immunosuppressives reduce the chance of building up antibodies during the period off so if you need to go back on to them in the future its more likely they'll work for you again as that is probably the main risk off stopping them for a while.