Today, mobile internet is exceptional. If you include an address to a picture in an email, that's what the recipient will see - the address. If it's hyperlinked they'll be able to click on the link and then the image will load. It's possible to embed the image in the email if you had a capable phone so the image would appear inline with any text.
In the early days of mobile internet you had to pay for connection time, well, I did any way. Today, it's all done by the size of the download. I have a 500MB limit on my calling plan so I could receive 500 emails with a 1MB picture attached or any ridiculous number of combinations of message sizes.
Just today I received a signed reference from a previous employer while on the go which I could read on my phone and send a message back saying thanks for the kind remarks. Mobile internet is great.
I'm impressed at your consideration for your recipients!