A real electric cello is rather different than a converted acoustic cello. AFAIK, an acoustic cello made electric by adding a pickup still makes all the regular noise it did before. I suppose you could fill it with concrete.

I think you need to find a way to play your real cello full-tilt rather than timidly or on a substitute.

I like cellopurple's wine idea but, depending on the layout of your apartment complex, that could be up to 17 bottles of wine.

If you were taking lessons from a teacher at an established school you might be able to sign up for practice room time as their full-time students do, but you'd have to commute there every day and that commute time is time you could have been practicing.