From an economic standpoint, S. jamesii tubers are probably going to be more expensive than commercial seed tubers from tuburosum. jamesii is also a bit dubious regarding edibility due to glycoalcaloids. TPS is probably too uncertain to determine yield without experienced growing it. Most TPS will not produce close to the yields required to feed people in any significant way. You would probably be better off trying to bulk source commercial seed tubers if economics is the driving factor.