Hi John, I've also got an eBay £50 Luyi 25-115x, and I have to say I'm quite impressed with, but what has made a huge difference, is using a heavy Camlink tripod (also an eBay bargain!). With a really solid base to work on the scope is excellent. I've my best views ever of the moon and Jupiter this last few nights.
Get a good quality, heavy tripod, then start saving for an RR scope, get the good one and switch it, your wife will probably not even notice the change - devious, but effective - I know!