This way you don't get nickle and dimed by the contractor and bleed dry of your working capital before a single shovel has broken ground. 

I had a French Drain installed, basement became completely dry.

America.but must air seal as it will bring warm air from conditioned spaces to basement. dehumidifier produces heat as by product, and takes more electric to operate. if go with dehumidifiers get large comm heavy ones with humidistat and direct drain. no one will walk away with it. 300lbsdont just open window unless dry air cat 1 wind blowing straight in.it wont remove moisture only feed it. i use activtek  air scrubbers secured to a bracket holding plate. it kills protects 2000-10k sqft of mold bacteria, and reduces moisture as its byproduct of technology esp basements.

Hope for the best, but it will be a scramble trying to get the roof dried in or other repairs immediately after the storm.  

The exterior is a little dated and there is a huge unfinished (dry) basement.

Now you see a ton of these guru's pushing courses as their main way to make money because property deal flow at the bottom pricing they need has dried up.In the states investors can be tougher to deal with because they know value.

You may want to sleep there or use dry gas to attract them...CO2 is what they track.

@Josiah McGinnisThat would be incredibly foolish to permit that unless maybe If the guy was a plumber and you have known him for many years .If that toilet is not sealed it will cause a leak and could rot out the subfloor or worse-flood the house .

If rotted, they can also replace window sill/framing on site, etc.

It has caused major rot and we already had to replace joists under the flooring a few years ago and the issue is reoccurring.