HF has a 5 gallon portable air tank for 20 bucks. I am looking for something for small jobs - inflating tires, small nailing jobs, etc that can be cordless and that my wife can use. This might be asking a how deep is a hole type question, but is 5 gallons practical? It would be for the occasional finish nail/trim nail job, inflating bike or car tires, pool toys, etc.