Torn between establishing another site or combining

I have a construction business which I created a site for. I revamped it on joining WA. I do property renovations, also known as remodeling or rehabilitation, for clients. I cover from floor to ceiling being tiles, kitchen cupboards, bathrooms and ceilings. I have a network of professionals and subcontractors I use for this. This is step 1 of 4 in my 15 year plan to become a property developer.

On the side I have managed to bring a group of my peers to form a property investment club where we bring our funds together on a monthly basis in order to jointly buy properties for rental. We should be able to buy one property per year. This will build a foundation for funding property development by the time I reach stage 4 of my vision.

These properties will need some renovation at one point or the other, including on purchase to improve the value, ongoing maintenance during the tenant occupancy or when we decide to change the setup for various objectives.

I have some ambitious thoughts about the online offerings concerning this group initiative include a membership function for current members and a future offering of client members for some products I have in mind including affiliate marketing.

Now I would like to post some blogs concerning this new initiative. So I am wondering whether I should do this on my construction site or establish a new site for this niche. I am inclined to separate the two as separate niches but I also do want to spread myself too thin. I already have another site promoting WA on top of having a full time job in IT.

Would appreciate some thoughts for or against or even a third alternative. Thank you friends.