No such new wire welder for under $300.
You want at least a 175 or 180 for what you say you are going to use it for and those run $750+new or so plus gas and supplies.
A cheap $$$ welder is usually just that.
I have a 135 for small stuff and a 251 for anything else.
Buy the biggest welder you can afford the first time and be done with it as it will pay for itself 10 fold if you use it as you say you are.
