Good work
A guy I work with changed his at work so he could do it indoors, he finished working at 2 and was still trying to put his car back together when I left at 6:30 and that was with an assitant. He said next time he'll pay )
Alternator's not that bad, if it were timing belt, would let the shop do it.
Depends on placement. Like changing a thermostat is basic as ****, good luck changing it in my old car without essentially dropping the engine.
Good work though tp, you can save so much money doing **** to your own car. At the same time it can be soul crushing labor.