getting my name on the mortgage

nester12

Hi all, I was wondering if anyone would help me with the following situation.

My mum has an interest only mortgage which will be running out in 4.5 years (180k). I want to become a house owner so I can apply for a buy to let mortgage or equity loan and start my property venture.

Myself
I am self-employed and by next April, I will have two years of tax returns which will show a net profit of around £30k per year (before tax). I have an excellent credit score, no debts, no dependents.
As soon as I get my two years tax returns, I want to start the ball rolling and get my name on the residential mortgage. What will be the best way of doing this?

My mum
Purchased the mortgage around 15 years ago when she was working.
Now she has retired and her income is rent from a flat and her pension.
Her net profit is 16k before tax
She has a good payment history.

The property
Mortgage – 180k
Current value 700-800k

What would be the best way of me getting my name on the mortgage?

1. Apply for 180k mortgage on my name solely?
2. Joint ownership remortage with my mum?
3. Add my name to current mortage?
3. Can I do any of the above in 1 years’ time even though the mortgage runs out in 5 years?
4. If I do successfully become sole or part residential owner, how easy would it be to get a BTL mortgage or equity loan of 200-300k.
5. If I am joint owner of the residential property, will it make it harder to get a BTL mortgage or equity loan?

Any help would be much appreciated!