Basically dwarf and semi-dwarf cherry rootstocks are not available in small quantities.
See this for discussion-
From my experience both Gisela 5 and Krymsk 5 (semi-dwarf) will sucker. For the Gisela 5 tree I induced suckering by burying the graft union. With Krymsk 5, the rootstocks I had suckered I think because I was forced to plant them in wet, heavy, compacted soil. But I think in most cases you will probably want to start a stool bed.
I would also just think about buying trees rather grafting them… what scions are you looking to graft?