The resources gained from going outwards will increase our wealth to where modifying inner system will be affordable. tHe biggest issue with venus is its rotation. We would need to find out how to spin it up. Lots of energy, how do we apply it?
How about do an asteroid impact to venus in a position and exact impact area?
In 2312 by Kim Stanley Robinson (of Mars Trilogy awesomeness), a ~70 year plan to terraform Venus is underway. It includes many asteroid impacts orchestrated with extreme precision over decades to accelerate Venus' rotation, and a "sun shield" in heliocentric orbit between the star and Venus. The vulnerability of the sun shield to economic leverage and terrorist attack is emphasized. The asteroid impacts are incredibly destructive and Venusian land is valuable only in very long term markets; civilian colonization must wait.
Incidentally, in this storyline the Jovian moons have been colonized for over a century