+0
Hi,

I really appreciate the effort you're putting in to locate a home for me! And

I really appreciate the effort youre putting in to locating a home for me!

Are both natural and grammatically correct?

Thanks for caring!
+0
Only the first is correct and natural. If you remove 'to' from the 2nd, it will also be acceptable.
Comments  
Students: We have free audio pronunciation exercises.
What about:

I really appreciate the effort you're putting in to finding a home for me.

Why can't -ing be used?

Thanks for input!
I've mislead you, I guess, because your sentence has a peculiar problem. This may be open to discussion, but this is how I see it:

the effort you're putting in finding a home -- Put in is a phrasal verb, finding is the object gerund
the effort you're putting in to find a home-- Put in is a phrasal verb, to find is the object infinitive

(X) the effort you're putting in to finding a home-- Put in is a phrasal verb, but to fiinding is wrong; it's an infinitive particle + -ing verb form.

the effort you're putting into finding a home-- Put is the verb, finding is the prepoistional object gerund.