First time buyer in Scotland, [M33] SelfEmployed, [F31] Employed

Hello!

My wife and I are on the amazing adventure of buying our first home in Scotland, we live in Glasgow. Here are our profiles basically:

- I am self employed, with a comercial contract with a client that allows me to have a regular income monthly. This contract is renewed yearly, started on Jan 2024 and just renewed it. I also had a salary increase this year. I only submited one tax return for the tax year of 2023-2024. I mention this because I think it's important? My annual income it's 24900 before taxes.

- My wife works for the goverment, making 27000 a year before taxes.

- Our net income monthly it's around 3600 pounds.

We have 20000 pounds available for a deposit. I've checked many calculators online and it seems our situation is not the worse and we are looking for properties for a maximun of 140000 initial price.

Are this numbers too risky? Too conservative maybe? We'd like for our mortage to not last longer than 20 years. At the same time, we are not from this country and we have an already paid house in our home country, so we were thinking, worse case scenario (Both of us go unemployed at the same time and not finding anything in a year) we could go back home and rent out the new place so "It pays itself".

I'd like to hear your opinions about our situation and see if there are any areas of improvement. Thanks!!