Opinions please

Be very careful about taking on side work while at your job, from that job's customer.

Even if you are 100% in the right, the customer can ***** to your employer, and rather than risk bad word of mouth involving their company, they will likely fire you instead.

I've seen it happen more than once.

I'd also be careful about doing more than a couple hours work on any job that looks like it's going to be close to $100 or over, and possibly not be worth repair.

I've been burned by that at least twice, once by a church even!