Solo is only allowed until Gaumukh. For Tapovan, you need a guide. You can not remt anything im between, you have to take all necessary things from Gangotri
That said, in bhojwasa, there are couple of places to stay, which you have to book in advance from the national park office at the starting point of the trek. In tapovan, there is a Mauni baba hut, however he usually doesn't allow anyone to stay in there
The maximum that you can get is 75. Rest it is decided by the approver on the basis of quality of your writing. Make sure your blog is not plagiarized.
Absolutely not.
It is an architectural briliance.
I have been there repeatedly as my college was nearby but never feel it is enough.
I again visited there 2 yrs back.