Ontario applies a non-resident speculation tax on top for foreign buyers. First-time buyer rebates exist at both the provincial and municipal level; an investor qualifies for neither. Budget the statute in force on your closing date.
In a condo the status certificate is the deal: the reserve fund study, the current balance, any special assessment and any litigation. A special assessment voted the month after closing is still yours.
Pre-construction assignments are a separate contract file with occupancy fees, an interim closing and a builder's right to amend. They are not simply a cheaper resale.