I do relatively small batches of grain on the hob (up to 2.5Kg) using a mashing and sparging bag. I have 2 stockpots, one of which is used for the mash, and the second which I half-fill with water near the end of the mash period, and heat to 80 deg C. When the mash is complete I sparge by lifting the bag from one pot to the other. It then sits in the other pot for 10-20 minutes or so before removing. I sometimes support the mash bag above the pot while the remaining wort runs out, but as often as not the bag gets put in a big mixing bowl while I add the sparge wort to the 1st volume of wort.
I started with the full AG kit, I did not realised that all I really needed was a thermometer and a mashing bag, and some kitchen pots.