If co-owners having disputes, U think both would engage the same lawyer ?

Dispute between co-owners is only about money.

If one don't want to sell, what is there to sue ?

Unless TS can proved to the court that the co-owner benefited more from the joint ownership, then the judge may order a forced sale and distribute the proceeds.

After deducting outstanding loan, legal and sales expenses, there may not be anything left to distribute ... but a 'legal' way to severed friendship 😅

In co-ownership, it is deemed equal shares unless specifically stated in the the land title.

Benefiting is when one co-owner receives rental income without benefitting the other co-owner.

Payment and upkeep is expensive benefitting to sue in court. The plaintiff can choose to stop what he is doing and let the law takes its course. Why keep paying when there is no certainty of getting back what are paid esp if the property is later sold at a loss ?

More likely the property will be sold at a loss and the sales proceed cannot cover the loan.

Owners have to pump in money to effect the sale, otherwise the bank won't signed off. If the other co-owner has no financial means, how to sell ? Even if he sign the SnP, the deal will later be aborted and more cost incurred.

Unless ts undertake in writing to take care of the losses, possible the co-owner will sell. As stated earlier, is all about money.

Or maybe, the co-owner is hoping for the property price to go higher ?

The property is not under any loan, yet i have never received my share of rental income. My entitlement has been denied. I now intend to take legal action against him to recover my rental income or to do a force  sale of the property.