I know some people who couldnt afford a new roof. so they picked the
worst side and had 1/2 replaced the front. home looked good from
street, street side was worse anyway

the back they gooed with roof tar, and some cheap mobile home roof
coating. it looked bad but stopped most of the leaks.

2 or 3 years later they replaced the other side of the roof.

its something to consider when fiancially challenged.