Sorry to throw an additional spanner in the works OP, have you had any quotes on the works yet? Both labour is in short supply & the shortages in building materials have increased the costs hugely We have just pulled out of purchasing an investment purchase for this very reason. Builders were even wanting to charge us to quote and they are so busy. My solicitor said don’t buy a problem, Rose, if it’s a problem to you when you buy a property, it will be a problem when you want to sell. Excellent advice.
Not sure of planting tall trees so close to the property is a good idea, they draw a lot of moisture and could effect the structure of the house, insurance company’s usually ask if they are trees close to the building within 5mtrs.
You can make the garden look lovely, but you need to accept that the mast is there, the garden is small. Only you know if you can live with that, if the answer is yes as the house has many pros then great, if not it’s not the right house for you. Most people are really excited when they are moving to a new home, yes slight nervousness too, but you seem to be focussed on these (very real) negatives.
Personally, we discounted lots of lovely family homes, because the garden was too small, I had young boys that wanted to run, play football etc. I would never have dreamed of buying one with a mast either.
Thinking really carefully, if this house is what you want. Good luck OP.