Prior to Covid (and a cancer diagnosis which, I suspect might increase my travel insurance premiums!) I was paying just £16 for annual European cover with HolidaySafe. (That was for a guy in his upper 60s with, at that time, no known health issues).
Their prices for single-trip cover currently start from £6.46, so perhaps they might be able to offer you affordable cover?
https://www.holidaysafe.co.uk/
In terms of health cover, ensure all travellers have a GHIC insurance card (see the link below).
Despite the UK population being stupid enough to vote to leave the EU, and therefore cannot use the former EHIC insurance card (which provided fee State health care within the EU) – the replacement card will get you health care in the EU at reduced cost (or sometimes free).
The most important element of travel insurance is medical cover. Don't scrimp on that. You can always claim for the contents of your lost suitcase, the missed first night in your hotel because your flight went tech but if you don't have enough cover for your medical needs you will be in serious trouble. Check medical cover before anything else (and not the price of the policy)
if you're looking for an immigration lawyer in UK, there are a few things you need to know. First, make sure you are dealing with a reputable firm. There are many scam lawyers out there who will try to scam you. Second, make sure the firm you are dealing with is registered with the Office of the Immigration Services Commissioner (OISC), the body that regulates immigration lawyers in the UK.
https://www.immigrationsolicitors4me.co.uk/