Saskatoon isn't the only city currently planning how to renovate it's arena.
Key Center in Seattle is increasing its arena to NHL & NBA standards by not raising the roof
but digging arena lower to add seats and increase facility functions.
https://seattle.curbed.com/2018/8/1/...echnique-video
I wouldn't recommend Saskatoon spending as much as Seattle to 'dig' a bigger arena, or Madison Sq Gardens $1 billion, 2013 expansion/reno since the cost is too prohibitive.
But raising the roof seems like the most logical way for Saskatoon to proceed.
Buffalo's Memorial Auditorium cost approximately $52.6 million in 2017 dollars to renovate, increase seating capacity from 10,449 to 15,858, added new upper level with stairways, escalators and upper exits, getting rid of exit tunnels from lower levels & a new scoreboard upgrade.
San Antonio's Hemisfair roof lift cost $4 million in 1970's USdollars and increased seating by 6,000.
Allen County War Memorial Coliseum In 2002, had an extensive $35 million renovation and expansion raising the roof by 41 feet (12 m), increasing seating by 2,500.
Gallagher-Iba Arena completed in 2000 cost $55 million, increasing seating capacity from 6,381 seats to its current 13,611 seats.
Greensboro War Memorial Coliseum's $45.7 million expansion project in 1990 added 7,000 new seats to final 23,200 seats & doubled the size of the adjoining Special Events Center.
I'd think SaskTel Centre's raising roof project would cost less than the above examples since it's raising the roof and re-enforcing the upper girders to bring up to current structural standards in the industry and isn't to necessarily add huge amount of more seats... but while they are at it they probably could add an extra couple thousand seats to make it the size of other arenas in North America that attract large scale shows.
Something I'm noticing with arena discussion with-in city of Saskatoon is that there doesn't seem to be a lot of informed decisions being made. How can anyone say that a new arena or a reno'd arena is the way to go until a break down in cost is illustrated for people to decide which direction to go.
The worst thing would be to make a rash decision to quickly construct a new arena that's built obsolete within a few years by not being informed enough about new concepts in arena architecture that could add features and cost efficiencies.
An example is 'inverted-bowl' arenas featuring enlarged concourses, cantilevered balconies & improved seating but are ~20% more economical to build, take up less space and more efficient to operate, and are the new evolution for live spectator experience.
http://theinvertedbowl.com/