You can buy DVD/VHS recorders, but : whilst you may get a cheap one to do the trick, the problem is whether a cheap one allows you to specify the recording time so that the writing bit rate is adjusted precisely. By this I mean: say for a one hour disc, the recorder records at 10,000 bits per sec. To put 2 hours on a one hour disc, it writes at 5,000. What about a tape that lasts 65 minutes. Suddenly, you lose quality because it's defaulted to 5000, rather than adjusting to something like 9,500 (that is, dropping the bit rate proportionally so that it fits precisely onto the disc. (the other way, at 5000, in effect you have half the disc blank, and reduced visual quality to boot!)
The other problem is, all the inbuilt electronics going into stabilizing the image etc etc from the VHS to give you the best picture quality - that costs money!
I wouldn't have rained on your parade except...I'm just down the road from you, in Dumfries, on the A701 half way to Moffat (and the A74). I have a brilliant JVC 3-in-1 that I have used to convert all my own tapes, and weddings and what have you of friends and their friends (And I don't charge other than 40p to cover the cost of each Sony Accutron (best quality) disc. Since it's a one-off, save your money and I'd be happy to play with my equipment (toys) and do it for you. If you want to go ahead, reply and somehow we'll send phone numbers to arrange it.