Speculation that Berlusconi will sell has increased since a Milan administrative court ruled the Italian premier's holding company, Fininvest, must pay 750 million euros to rival CIR for bribing a judge in a 1990s battle to buy Italy's biggest publisher Mondadori.
Fininvest has repeatedly denied Berlusconi has any intention to sell. Arab investors have also been linked to the club.
"(Spending 700 million euros) is no problem," Taci said in an interview published in Wednesday's La Gazzetta dello Sport.
"My group is used to taking on big commitments and seeing them through to the end. I'm sure I can find the necessary financing."
The 700 million euros figure matches analysts' valuation of seven-times European champions Milan, who are struggling to find form.
Taci said he had talked to Berlusconi about buying the club.
"He told me that he does not intend to sell, but I know that if he decided to, he would take my proposal into consideration."
Taci said he would be happy to buy the club outright or let Berlusconi stay on as a minority shareholder or acquire a minority stake himself.
But he promised the club would prosper if he took over.
"I guarantee that I would do everything to keep Milan where they deserve to be - at the top of the world."
Taci admitted that his bid to buy Serie A side Bologna in the close season fell through because his hopes were raised that he might be able to snap up Milan.
"As a Milan fan I thought it was best to be patient for a little while," he said. "Why kid on people of Bologna if there was the chance a bigger door would open in the meantime?"
