I have this set up. Bench seat missing in this picture. It came with the boat but the bloke said it was £300+. A lot of parts needed , even throttle & gear linkage under engine cover. I remove my engine for towing & the cables take 5 minutes to install. The steering & throttle box has two bolts either side which takes another 5 minutes but I leave on. The boat is much flatter in this configuration with the fuel tank at back. When my mate moved backwards to check the fuel level the front rose instantly. I was toying with the idea of changing to a tiller but I would only gain a little more deck space.
You could maybe try a tiller extension to allow you to sit further forward to distribute weight. Fuel, anchor etc right at the front will create quite a bit of leverage.