Hi James
The saw stand shown in the advert (DE70234) is the top of the line DW model and they really are superb pieces of kit, especially for a site joiner, but at a new price of £140 to £160. So probably overkill especially as you can more or less knock-up a working stand and trestles out of discarded pallets for the cost of a bit of time and a box of screws (done it loads of times, although not these days). The question is really what sort of size (cross section) materials are you intending to cut and what sort of jobs do you see yourself undertaking.
For example if you are looking to do some basic 100mm skirting, 70 mm architraves, 3 x 2 stud work then you can buy a lot of saws for the money you are talking about. At one time I had a Makita MLS100 which was used on just such tasks, but was also retained for cutting up aluminium profiles we used on interior fit outs. That saw back then cost me about £100 (they are about £150 today) and was used at weekends to build decking, fit planked floors, etc as well as doing the majority of the skirtings and archis on a house we renovated. The downside was that it wasn't as easy to read the scales as a full-blown trade saw, the capacity was more limited and adjusting the back fence was a chore, but I had that saw for 8 or 9 years before "gifting" it to our apprentice. One plus of the tool is it that it uses easily obtained 250mm blades on a 30mm bore - whatever you do choose check to see that you can obtain decent blades from a variety of sources