If you look carefully for the portable induction burners that are rated for ~1.3 kW, they are excellent. You can get them for about $100 and they would replace about half your cooktop usage. Much better for low temperature work and boiling type work.

We have one and it’s great for low-and-slow unattended cooking. We don’t use it for regular/daily cooking because we just don’t have the space to give it, but agreed that it would work technically for a lot of our cooking if it took up space where the cooktop is or if our kitchen was bigger/had more countertop space.