Hello there,
I am an expert architectural visualiser, I have over 6 yrs of experience using LUMION.
You will find sample of walkthrough made in Lumion in my profile. I would be glad to share you further samples to assist you.
For the bid I offered, I ll make a detailed walkthrough animation up to 3 minutes , you will have to provide me the complete model, details of description etc.
The scale of your project is not clear at the moment, so the bid can be revised when further details are clear.