HDB or Condo 1 name?

Married with around combined income of 250k per year.

We have a 4 room HDB now, with only 1 name. Next steps, we would like to upgrade our house in terms of size. So looking at EA/EM HDB for growing family.

Few years back, we wanted to stay in our 4 room BTO and buy a condo, to rent out the 4 room or condo. But with the amt we have, we probably can only buy a small condo. So that will leave us with 2 small houses.

However due to growing family size, we would prefer to have a big HDB.

With this, how can we still own 2 properties, knowing that I have a 4 room BTO with 1 name only? Should I sell away the 4 room BTO once MOP? But seems wasted to have put 1 name if we are going to sell it lol.

Or sell away the 4 room bto and buy EA with 1 name?

Timeline: 4 room MOP in 2028

Any other ways to own 2 properties? Other than the 1 name for HDB?

Thank you all!