If the signal have to go through the building and the tree, what do I need then?
What equipment will I eventually need?
A leased satellite channel?
Seriously, you can try various things, including signal amps (boosters) and dish antennas, but in the end, this wireless technology is a local area technology. It is not intended for long-distance broadcast.
Of course, you could invest in commercial equipment being used by various companies (and, regretably, some cities) to deploy metro-wide wifi, but that equipment is a bit pricey.