Some telescope networks like Slooh [1] are essentially crowdfunded, and offer remote access on a per-hour basis. There are also telescope hosting services out there, SpaceOBS [2] being an example located in Atacama (probably the best observing conditions available for an amateur), and iTelescope [3] in the Siding Spring Observatory.

[1] https://www.slooh.com/

[2] http://www.spaceobs.com/

[3] http://hosting.itelescope.net/