New Windows ???? HELP

[Chantz Ireland]

I bought a triplex last year and an currently renovating the units. The building really needs all new windows, its got old aluminum windows that sweat a lot (Water in the window seal) and it causes mold issues around the frame. I had a guy from "Window world" come out and quote the building, The quote came in at $8,500. I am wondering if I should bite the bullet and get all new windows or if there is an alternative route??

Any suggestions or ideas would be helpful

Thank you

- Chantz