Move & Remortgage Advice

Hi all, hoping for some advice on best avenues for moving to a larger property. We've been looking about the market for a year or so and would love to move as we are needing more room with two young kids, but current market seems to be a stretch too far...

The story so far

Currently in a 3 bed starter home (~£120k value)
Current mortgage ~£80k so approx. £40k equity & 17yrs remaining
Household income ~£45k
Loans/card debt. ~£12k

We would like to move to a larger property in the area (North East) and would probably need to look around the £180k-£200k mark to find what we are after. Looking around we are struggling to decide the best route for finding what options are available to enable us to get to where we want to be.

I do prefer repayment and fixed generally, but we have also looked at interest only to see if would enable us to move (due to household income should increase as the kids would be in school full time and the two of us will be back to full time work instead of just one at the moment).

Would an IFA be a good route, should they have be able to consider our current situation and assist in getting where we would like to be?

Thanks in advance for any advice