hi there
that must be 15 litres a minute.
there is a theory about kit in general,
think about what your going to do with it, and then buy a machine from the next rung up the ladder, this then allows you to expand later,
that said, if you buy a bigger machine, then you will write off a larger amount in value in your accounts.
a lotr of people look at plant cost in different ways.
example
piece of kit costs £6000 say, with a 3 year write off staight line depreciation, not taking into account first year allowances, then your offset is £2k per year.
therefore you need to achieve at least that amount of work to cover your annual plant cost.
i hope that makes sense.
the other way to look at is, buy the largest piece of kit that you can afford, then this gives you a larger potential client base, therefore potentially more work, and more money.
in our case, we use a smaller machine as we only get ad hoc jobs, no advertising, and then when we get our specialist larger jobs, factury unit, walls, roof, etc, we either bring a larger trailer mount machine in, or sub it out.
regards
martin