I bought and used the 6.5 hp Boremaster and completed a 40' well with it.  I found it easy to assemble and operate, however there were many problems I encountered that were due to my in-experience with this type of equipment and this type of project.  Drilling a well isn't easy folks.  You don't pay $2400 and then get a new well in the mail.  It sounds easy, but there is a great deal of research to be done just to comply with the local well management laws.  In Minnesota, they are quite precise.  I wanted a 4" well, and so had to drill a 8-1/2" hole.  The extra space must then be sealed using a High-Solids Bentonite mixture.  This is to ensure that surface water doesn't seep down the sides of the casing and contaminate the aquifier.  This stuff is thick, and won't pump through an impeller type pump.  I had to buy a separate diaphragm pump for this job.  The drill itself did quite nicely drilling through clay with the bits included.  I had to have the reamer bit modified to create the 8-1/2" hole.  I was lucky I didn't hit any rocks, as I didn't want to spend the extra money on a tri-cone bit.

The water pump included seemed to go through a lot of seals.  I'm not sure it was made to handle high volumes of drill gell, not to mention the grit that washes up from the hole.  It would be worthwile to have a few extra seals on hand before begining.  Also, the drill did not come with an electric winch, only a hand winch.  I bought a 2000 lb winch at the hardware store for $150, and was glad that I did.  When I finally hit sand, the drill began to drop very quickly, and before I knew it, the hole had collapsed.  It took every bit of that winch to get it out.  I would think that an included electric winch would be standard, but it is well worth buying before attempting any drilling.

This well was cheaper than a well drilled by a contractor, but just barely.  But I learned a great deal, and had fun in the process.  That's what do-it-yourself means to me.  Also, I view the equipment as an investment, since the next well I drill will cost very little.  Already I have had 2 people who have asked about renting it.  Everyone needs a well sooner or later, and when water is sold in bottles, I think it a handy tool to have on hand.