I know a couple of guys with similar machines and they are ok for a few months and then normally break, getting them repaired is not financially viable and so often they are either replaced with a new one under guarantee or the owner buys a new one.
Like DWD says these things should be considered disposable.
You can pay a few hundred quid for a decent one that will last or you can buy one of those that will do quite a few jobs and then need replacing!
For me I'd get the dearer one as it is hassle for me to send something back when it breaks.
I learnt this with my first car. The Alternator went and so I bought a reconditioned one from a local shop, a week later it went again! The shop gave me a replacement one no problem, but I had to take off the old one and then fit the replacement one. Two weeks later it went again and I had to fit another one

Each time I had to get my friend to take me to the shop to swap it! In the end I went to Halfords and bought a brand new one, it was twice the price of the reconditioned ones, but I fitted it and it lasted 3 years
