why wanna combine?
really catch worm into backside... as the Chinese saying.

just do all the reno and open door and wall la.

well...happy for your to found you idea property which you see yourself staying for long.

any particular reason you want to join the title?

my point is that you may extend, expand and break wall with 2 individual title. Personnally i just feel it create more trouble in future.

a few scenario we may think off- but it may not of your concern, then it is ok