Look obviously your daughter means alot to you. If your having doubts and not feeling this rishta. Theres gonna be alot more rishtas out there. Dont rush it take your time. And dont send her too far away. If she is your only daughter do whats in her best interests.
Im the only daughter and there is no chance my dad would send me anywhere other than where im from. Simply because he will always want to see if im ok. HOWEVER if you know this family well then only you know the answer to it.
And btw dont worry about the asthma or her ‘sensitive nose’ Most people have that and survive. Also theres hot n cold n every country. Jus dont do anything your going to regret in the long run. Good luck.