Noloco, Glide, Softr. If you need a big backend then probably xano + noloco is your best bet.

Yeah just bear in mind if you have product market fit and you figure out a way to deliver the product even more quickly, the price doesn’t necessarily need to go down.

Given you are investing money in tooling, try to model the ROI, then compare that to other options including status quo.

Squarespace is pretty great for your front end needs, there is a zapier integration that might be able to pull in data from your api.