hill sounds good. you can check windows right now ( i think it's raining everywhere). this is layman advice but gives you a good idea of problem areas. look at the frames: do they fit well? are there any cracks around the frame on the outside or inside? is the water gathering in the slides (if sliding windows) or inside the frame (if panels)? do screws fir well and are set tight?
on a good day get up on the roof. are there any cracks? openings? water gathers anywhere? what about area next to tinaco? sealed well? piping intact?
you can do small repair yourself with a silicone, they sell it in transparent, white or black so it can be used in any colour frame. roof can be sealed with a sealer and that should be done routinely, every few years. but the most important part is that you keep a hawk eye on current owners. if you report any damage and they do not want to fix it - a bad sign. a house is constant maintenance. you will not know how the house takes super heavy rain/storm until you are faced with it. then you either do repairs or fix things making sure no future damage is done. you have to repaint the house and all iron regularly. if current owners are not doing any maintenance the chance is they never did anything and some stuff only holds together with dust, rust or dirt
as a house owner i can say i feel good and secure. i have something of my own and as a last resort it can be sold. even at half price to some rotten hearted bastard like myself
but i also know owning house is constant costs. if you want to live well you have to spend money. over time it will be the sum non recoverable. say, you paid 100k dollars. over years you will repaint, do the roof, walls, pipes, wires and so on. even if you sell at 150 after 10 years it may be that in those 10 years you actually spent 50k more on maintenance and changes. so you end up making nothing or at a loss, especially over a long period of time.