Malta is on our red list at work, never had to investigate any transactions via there as of yet though...
Based on our experience moving lock stock and barrel to Italy...... Even before Brexit there were lots of bureaucratic hurdles and hidden costs moving to the EU. Regarding renting out, bear in mind that the taxation rules are such that you would need an accountant (expensive) to handle your affairs (PAYE makes UK tax returns relatively simple for most Brits living in the UK but things are very different abroad ). Some long term immigrants used to' live under the wire' but communication and infropmation exchange between tax departments in the UK and EU has changed all that. Get your returns wrong even accidentally and non declaration or false declarations result in steep fines. Bear in mind the language barrier when completing official legal documentation too. Not putting you off but you need to do a lot of research before you go down that rabbit hole. I was 50 when we started down the emigration path and we only completed the transition and move after 9 long years. I can honestly say at my current age of 67 i would not want to start all that again. IF you ARE determined enough go for it. I would almost certainly go down the medium long term rental path. £110k over 15 years is quite a sum per annum around £1200 per month fro food and rent for 6 months excluding flights to and from destination travelling around when there. You also have to factor in that food costs are roughly the same so your UK day to day living cost budget also available to spend whilst abroad.
A word of warning mate. My father in law retired to Spain and bought his retirement property. There was then a huge development sprung up near by and his quiet retirement was anything but. He cashed in a pension and bought something else to get away on the premise that he'd shift the first place (which was lovely) quickly. It took him over three years to shift if after three price reductions. He planned on renting it but the nearby golf resort got all the let's and other than family it stood empty costing him nearly £300 pcm in ground rent and service charges. When he eventually sold it last month it cost him a quarter of it's values in fees. The charges over there are scandalously high! As others have said, I'd recommend getting another property over here and using the rental income to pay for a long term rent over in Spain Oct-Mar - you'll get a lot of interest from people in a long term let as that's the quiet season when a lot of holiday lets sit idle. I should add that my father in law and his partner both hold dual English/Irish nationally so have no issues with residence- you will be limited by visas on hoe long you can stay.