Will all large purchase from time to time, ie new van. I found that when I had paid the £240 per month, for the new van I had spare money, to top that I was making too much money and did not have enough hours in the day. Too much profit means too much tax, so I purchase atm to cure all 3 problems.
I never felt the extra outlay as I had budgetted for the van and I just continue that. The tm allows you to complete bigger jobs a lot quicker so you end out with spare time and its a lot easier using the tm so you have more energy.
I purchased my tm from alltec, although this might not be your choice of call, Robert at Alltec is an expert on leasing deals, and has a booklet that explains how to lease a tm.
I think I have a spare booklet I could post to you if you do not wish to ask them.