Also I don't think we could raise more than 5% deposit and not getting any younger- can you get mortgage with 5% in 40s?
Yes you can. We were going to buy a pretty expensive house this year with a 5% deposit; if based on just his age and income they would offer us a 33 year mortgage (he's 41) but if based on both of us (I cannot/do not work) they would only offer us a 28 year mortgage term (I'm 47). I'm classed as a dependent, fyi.
Bear in mind with these longer than 25 year terms that you have to pass affordability checks, I'd had 25 years of working and paying into a state pension and he has a very good private pension, so they're obviously banking on taking money from private pensions well past retirement age, which is very far from ideal, and I'm glad we didn't do it.
Be mindful that just because you've lived in a house for 10 years doesn't necessarily mean that should be the house to buy. With a bit of patience and perseverance, there will be bargains to be had out there in the forthcoming months/few years.
In terms of deposit amounts, there's very, very little difference in mortgage rates between a 5 and 10% deposit these days, so don't let that worry you. But the less equity you put in a house, the more at risk of negative equity you might be in the future. The sensible thing to do is to buy under your means and overpay your mortgage a bit if you can; if you can't afford to do that, buy somewhere you know you wouldn't want/need to move away from within the next 10 or so years.