Struggler is right on the money.
If you do try to sell then any buyer who obtains a strata report should find that there are some financial issues with the SP. This could well lead to a potential buyer looking elsewhere or offering less.
If the admin budget is going into deficit then money from the sinking fund must be getting used to cover the running costs of your SP. That money should be getting replaced.
Questionable resolutions, poor financial position, poor compliance to the Act; it does not bode well.
I see that you have a strata manager. I think you need to talk to the manager and let him/her know you are becoming aware of some issue that do not reflect well on his/her ability to properly manage and advise the SP. It could be time to look for new management.
It sounds like the financial problems are easily fixed but it will cost the owners. The procedural and compliance issues are a lot harder to deal with.