I dont think it will be a very good idea if u are defficient in money and other silver units...sticking to Hashim(bronze soilder from desert set) will make the process slower and time consuming bt effectively save money and a silver and gold unit...per each time you want to do this...

Also i think what you are doing is called plat armour+ by people in this forum...it gives you more exp than using plat armour..provided the gold unit is male...
so if you dont lack the resource and dont wish to waste time..i think you should do it.