The broom on ladder thing should work fine, and more important shows that you have a creative mind, and don't insist on only made for the job stuff. Don't change your outlook.

BTW- if you're working in your basement and there are exposed pipes, make a quick workstand by tossing 2 ropes over a handy pipe and hanging the bike by the seat and handle bars.

You can also do whatever it takes (get married?) to get someone to hold the rear wheel off the floor for a few minutes while you work.