I think you are already setting yourself up for success because you are:
1.) having a vision
2.) are not willing to compromise for your vision by allowing anything or anyone less

Very few people are willing to do that as they are only in it for the money and would just take people on or anything for that matter if it is what an investor wants.

Let's not kid ourselves. Just because you have a vision and very possibly a very good one, it does not mean everyone is just going . Keep on talking to people until you find the right one, as at some point you cannot do it all alone.

Also treat investors the same as potential co-founders and partners. See if they align with your vision. Again of course it is hard to say no to money. But I know some founders, who lost all their joy, due to being pushed to decisions that did not align with their vision, even would hurt the company in the long run, just for short term profits.

So when investors ask you about your lack of other team members, tell your story (looking but not compromising & doing all on your own from your own money). That demonstrates enormous confidence in your vision/idea.

Good luck and if you need any help let us talk

https://clarity.fm/gerdtf

Cheers

Gerd Tittel-Feller