"tenant in the house" so you can't see the house, Mr Wholesaler..
Tenants are additional barrier to viewing the property before making the offer. The potential seller "doesn't want to disturb the tenants" when I ask if I can have a look. I'd say I have failed as a wholesaler to find a seller that's motivated enough or I haven't done a good job of building rapport to show I am serious. No matter though, what's the best practice to get in to have a look? Magic phrases? Polite persistence?