3 houses and not family home

[mortgagefreesoon5]

Need a bit of insight please. We have 3 houses, let's call them A, B and C
House A
Is in UK, small two bed terrace, we are living in it, town centre location, we cant extend, currently about 50% ltv.
House B
Is abroad, in the country side, needs complete renovation, around 60%ltv
House C
Is abroad, in the countryside, in fact is next door to House B, not mortgage, currently rented for 200 eur
So, we have 3 houses but not a family home.
I love the house where we live ( house A)but it's small, we have two small children/dog and we are working from home. However due to location I believe it'd be easily rented and it could be part of our pension when we come to retire.
We want a family home, my dh thinks we need to sell house A, but i don't want to sell it.
What would be the best way to finance a new home in our case? Family homes in our area are gbp300000.
Don't know if I make too much sense, I keep going over it, just need someone with an experienced perspective. Thanks

How much is each house worth OP?

Keep in mind that you may (depending on who owns and how you own it) that you'll be paying a higher rate of stamp duty on the new house if you keep A, as it'd likely fall under the April BTL stamp duty changes from the info you've given.

Good point Essential about duty changes, I recogn then, duty would cost an extra 10000 gb if we were to buy a 300000 gbp house
My dh an I own the houses jointly 50% each
House A worth 200000gbp owe 100000
House B worth 100000eur owe 40000
House C worth 60000 eur mortgage free