Okay. Got the model size.
Lack of hosting is my issue...

Thanks for your reply.
The initial problem is how to go about hosting/viewing On my ipad - I just don't know if/how it could be done.

I have had no problems loading & displaying the largest of the demo-samples 3d models, but they are under 20 Mb. Do you know of any larger ones I could test? The ...

On the blog page:
http://www.sweethome3d.com/blog/2017/09/06/sweet_home_3d_5_5.html
the section "Navigating in 3D on the web" describes the advancements in viewing sh3d files on html5 web browsers and it mentions the 3d viewing includes ios devices.
The sample 3d house views well on my ipad.
I have ...