As Jimmy-T says. But water leaks are an emergency measure, and so need to be responded to quickly. The extra time to get more quotes may not be warranted, so the repairs can start immediately. The cost looks in the ball-park for this sort of work, so I’d say go with it.
And as a long-suffering secretary of a strata building, I am a little peeved at other owners telling the committee to get more quotes, when the quotes are reasonable. It’s bloody hard to get quotes! Tradies prefer to do paid work than to turn up and help make 3 quotes, when they aren’t likely to get the work. It’s really hard, currently, to get any quotes at all for jobs… So, my common response for owners, like you, who want more quotes, is to say “thank you for helping out, and please arrange them and provide them to me within the next 10 days, or so, as we need to progress with the job”. Never hear anything further…