what of buying a router for the other house then connect them with ethernet cables.
As for covering a house, buy Google nest Wifi, ni kitu 15k
Disclaimer: Not a networking pro, just a suggestion. so apologies in advance if my opinion might be wrong
Most universities upload their content online, you can easily find the notes and videos kitu kama hii https://lagunita.stanford.edu/courses/Engineering/Compilers/Fall2014/about