renting the condo

[AirbusA321]

Can I use some of these sentences when I don't know yet how long I want to stay there? I mean maybe only a few months, maybe for many years.

1 I'm interested in renting the Mandaluyong condo undatedly.
2 I'm interested in renting the Mandaluyong condo on a perpetual basis.
3 I'm interested in renting the Mandaluyong condo open-ended.
4 I'm interested in renting the Mandaluyong condo for an unlimited period.
5 I'm interested in renting the Mandaluyong condo without limit of time.
6 I'm interested in renting the Mandaluyong condo indefinitely.

 

[GoesStation]

I'd use the construction of number 4 but replace "unlimited" with unspecified. More typically, write I'm interested in an open-ended rental.

 

[SoothingDave]

"Undatedly" isn't a word.

Use "indefinitely."

 

[Tdol]

But these don't imply to me that you might only be staying for a short time.

 

[bubbha]

1. "undatedly" is not a word I've ever encountered. Spellcheck doesn't consider it a word, either.
2. "on a perpetual basis" means "forever".
3. Words are missing. Change it to "... on an open-ended basis".
4. "for an unlimited period" means "forever".
5. "without limit of time" implies "forever", but it's a rather stilted-sounding phrase.
6. "indefinitely" literally means "for an undetermined period", but in practice it implies a long time.

The best answer for your purposes is 3, if you change it according to my suggestion.

In real life, however, you would have to fully clarify your meaning to the landlord with a more comprehensive description of your wishes, explicitly telling him/her that it may be as short as a few months but as long as many years. In such a case you may start out with a month-to-month lease, and later changing to a yearly lease.