I've been looking into this since yesterday. I'm very intrigued now. Weber Kettle with side cart and propane starter just may do the trick. Pricey though.
Watch Craigslist and Facebook Marketplace. If you're willing to drive an hour or two, those Performers pop up regularly for under $100. Be sure to buy the kind that uses the small, disposable propane tanks. I have an older one, with the stainless table, that is now at my sister's place, that uses the 5lb canister. Those smaller cans are hard to find, so you have to pay to recertify.
Like I said, I _like_ charcoal, just got really tired of the extra work with lighting, heating, ash cleanup, etc.
I'd really like to find an older Genesis and make it a dedicated rig for rotisserie. One of the very best for that type of cooking, imho. Just don't have the deck space for it right now.