Tl:dr, funding/loans are in place, it will cost more to build including hotels/housing than Arsenal's and will hurt financially, but not as much as Arsenal's did, meaning we should still have money to improve the squad, as long as the project stays on target..
Tottenham blog, deep dive on the new stadium and it's financing.
https://thespursreport.wordpress.com/2016/01/11/the-300-million-funding-question-and-the-dangers-of-doing-an-arsenal-new-spurs-stadium-deep-dive-part-1/
Tl:dr, funding/loans are in place, it will cost more to build including hotels/housing than Arsenal's and will hurt financially, but not as much as Arsenal's did, meaning we should still have money to improve the squad, as long as the project stays on target..
Part 2 next week..