I'm late to the thread but I'm in the ride what you have camp as well. When I started riding I was over 300 lbs on old, used BSOs. (super low quality 26'ers, threaded freewheels, single wall rims...) They held up shockingly well. Yes, I totally had my share of broken spokes in the rear and even had to swap it out completely when I had to make an unplanned curb drop. The LBS was able to make it rideable, but it was a bit too far gone after that.
...I guess I'm saying replacing spokes is pretty inexpensive and it will definitely make you appreciate a nicer wheelset down the road.